JP2619736B2 - Fluid leakage inspection / filling tool for piping materials, sealed tanks, etc. and fluid leakage inspection / filling method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fluid leakage inspection / filling tool and a fluid leakage inspection / filling method for piping materials, sealed tanks, etc. For leak test, or as a temporary valve in case of liquid storage tank valve failure, it can be used simply and reliably with good workability. Fluid leakage inspection and filling tools in piping materials, sealed tanks, etc. It is an object of the present invention to provide a fluid leakage inspection / filling method capable of performing liquid discharge when the liquid discharge valve is clogged with extremely high workability.

(Prior Art) As a repair tool for a broken water pipe which can be used for repairing a water pipe without leaking water from the broken water pipe and water to an operator and preventing an accident of a worker, There are already developed technologies.

 This technique is described below.

As shown in FIGS. 5 (A), (B), (C), (D), and (E), conventionally, the water pipe (40) has been replaced with (A) for some reason such as aging, vibration, or earthquake. ) When a pipe breaks or breaks at a location, the soil (42) around the break location (A) is excavated and deleted, and the water pipe (41) around the break location (A) is cut. I do.

At this time, the tap water (43) flows as it is, and as shown in FIG. 5 (C), the water stop piece (44) passes through the end of the water pipe (41a) on the side from which the tap water (43) flows out. Insert the water stop piece (44) into the core of the water stop piece (44) and the middle rod (44).
a) to support the water stop piece (44), turn the nut with the outer rod (44b) in this supported state, swell the water stop piece (44) in the water pipe (41a), Stop the flow of (43).

In this state, the branch pipe (45) is connected to the water pipe (41a), the water blocking piece (44) is loosened by the operation reverse to the above-mentioned water blocking, and then the water blocking piece (44) is removed from the water pipe (41a). Transfer to the base end (45b) of the connecting branch pipe (45), connect the branch pipe (45a) and the water pipe (41b), repair the water pipe (41), and remove the tap water (43) for a short time. There is a device invented by the present inventor that can return to the original state without stopping the flow of water in the water main (not shown).

However, as shown in FIG. 6, in a liquid leak test immediately after the new pipe (46) such as a water pipe or a gas pipe, the terminal cannot be tapped due to the positional relationship with the wall surface (10). (47) In some cases, it is necessary to confirm whether or not there is any liquid leakage in the new pipe (46) due to a pinhole or poor connection.

Furthermore, as shown in FIG. 7, when the liquid discharge valve (49) of the liquid storage tank (48) is clogged, it is not possible to stop the water with the device already invented by the inventor and replace the valve (49). Even if it is possible, there is a drawback that the stored liquid jumps on the worker during the replacement work and wets the worker's own face, limbs, etc. and the worker's clothes.

Further, even when the storage tank (48) is a medicine or a cleaning liquid for precision electronic equipment which is not liable to be contaminated with dirt and impurities, the use of this apparatus has a drawback that dirt and impurities are inevitably entered into the liquid storage tank (48). there were.

Before attaching the liquid discharge valve (49) to the liquid storage tank (48) shown in FIG.
It was also necessary to check whether airtightness could be secured.

On the other hand, Japanese Utility Model Publication No. Sho 56-22414 discloses a "sealing stopper with a safety device for testing underground cable pipes" as a jig used for a test for confirming the presence or absence of water in an underground cable pipe.

The disclosed technology encloses a screw of a required length at each end, and an approximately central lower surface of a short outer cylinder having one end closed at an end of the outer cylinder in which a tightening nut is previously screwed to one end of the screw. To the outer end of a substantially T-shaped central pipe having a hollow handle having a socket for an air release valve and an air supply pipe fitting, and a washer, a spacing holding cylinder, a receiving washer, and an inner surface of a test tube for pressing the inner surface of the test tube. A safety device in which an elastic rubber cylinder and a receiving washer are sequentially fitted, and then a half-cone for ring expansion is inserted into a three-piece metal ring for expansion in which a rubber ring for compressing the inner surface of the pipe is fitted to the outer cylinder. One airtight holding plug which is fitted and screwed with a receiving nut to the screw at the last end to be integrated, and the other of which a round handle is used instead of the hollow handle of the T-shaped central tube of the holding plug. It is composed of a hermetic plug.

Further, as a jig used for containing a high-pressure fluid, "Backer" was also disclosed in Japanese Utility Model Laid-Open No. 60-131792.

The disclosed technique has a high-pressure tube having a conical portion and a screw and a screw adapted to the screw, has a flange having substantially the same axis as the high-pressure tube, and has a wedge deformable body connected to the outer wall and the conical portion. And a deformable body that is in close contact with the surface of the flange,
The deformable body is deformed by the action of the screw, and is configured to closely adhere to the outer wall, the conical portion, and the flange surface.

(Problems to be Solved by the Invention) However, in the above-mentioned Japanese Utility Model Publication No. 56-22414, the "sealing stopper with safety device for underground cable pipe test"
When the inside of the pipe is closed by the elastic rubber, the work is performed by tightening the nut with one outer cylinder, so that there is a problem that the workability is very poor.

That is, even if the nut is tightened in order to expand the elastic rubber cylinder, the elastic rubber cylinder is not fixed in the tube and runs idle, so that the elastic rubber cylinder cannot be sufficiently expanded.

In addition, since the outer cylinder and the hollow handle connected to the outer cylinder are connected to the elastic rubber cylinder, even if the inside of the pipe is closed by the elastic rubber cylinder, for example, the outer cylinder and the T-shape are always connected to the elastic rubber cylinder. A hollow handle in the shape of a tube extends from the end of the tube.

For this reason, for example, when the operation is temporarily stopped in a state where the inside of the pipe is closed, there is also a problem that the outer cylinder and the T-shaped hollow handle extending from the end part are very obstructive.

On the other hand, the `` backer '' disclosed in Japanese Utility Model Laid-Open No. 60-131792 is used only for sealing a high-pressure fluid, and is detachably fitted in a pipe as necessary. There was a problem that the pressure of the fluid in the pipe could not be measured or the fluid could not be filled.

(Means for Solving the Problems) According to the present invention, a water blocking piece capable of passing water, an operating rod and a hollow branch pipe detachably connected to the water blocking piece are provided,
The water-stoppable water stopping piece is provided with a cylindrical elastic body, and a through hole is formed in the elastic body along a central axis,
A hollow screw rod having both ends opened is inserted into the through hole, and a receiving plate is provided at a tip end of the screw rod to be in contact with a tip end surface of the elastic body. A washer that comes into contact with the base end surface of the body is loosely fitted, and a nut adjacent to the washer is further screwed to the base end than the washer in the middle of the screw rod so as to advance and retreat. A screw is provided and a right-hand screw is provided between the left-hand thread portion at the base end and the washer, and the operation rod includes a hollow outer cylinder and an inner cylinder inserted into the outer cylinder, A nut turning portion that fits with a nut of the water stopping piece is formed at a tip of the outer cylinder, and a female screw that is screwed with a base end of a threaded rod of the water stopping piece is formed at a tip of the inner cylinder, The hollow branch pipe includes a straight pipe part and a branch pipe part, and has an end part. A pipe material, which is all open and one end of which is detachably connected to the base end of the screw of the water stop piece and the connection of the hollow part of the screw and the hollow part of the branch pipe by this connection. , A water leakage inspection / filling tool in a sealed tank or the like, and a water stopping piece comprising a cylindrical elastic body having a through hole formed along a central axis, the through hole having both ends opened. A hollow threaded rod is inserted, a receiving plate is provided at the distal end of the threaded rod, which is in contact with the distal end surface of the elastic body, and a washer, which is in contact with the base end surface of the elastic body, is loosely fitted in the middle of the spiraled rod. And a nut adjacent to the washer and the base end of the washer is screwed into the middle of the screw rod so as to be able to advance and retreat, and a left-handed screw is provided at the base end of the screwed rod. Between the washer and the washer Is provided, a hollow outer cylinder and an inner cylinder inserted through the outer cylinder, a nut turning portion is formed at the tip of the outer cylinder to be fitted with a nut of the waterproof block. An operation rod formed with a female screw to be screwed with the proximal end of the screw rod of the water stopping piece at the distal end of the inner cylinder, and a straight pipe part and a branch pipe part, all of which ends are opened, A fluid leak is formed by using a hollow branch pipe having one end detachably connected to the base end of the water stop piece and the hollow part of the screw rod and the hollow part of the branch pipe connected by this connection. Inspection and filling method,
Insert and fix the water stop piece through a control rod at the point where fluid leakage inspection or fluid filling is required, and stop the nut turning part at the tip of the outer cylinder of the operation rod with the water stop piece fixed. The nut of the water piece is fitted and the female screw at the tip of the inner cylinder is screwed with the base end of the threaded rod. Then, in this state, the inner cylinder is rotated to expand the elastic body of the water-stopper, and the above-mentioned portion is fixed to the water-stopper. Then, the operation rod is detached from the water stop piece, then the end of the hollow branch pipe is connected to the base end of the screw rod of the water stop piece, and the inspection device is attached to the other end opening of the hollow branch pipe. By providing a fluid leakage inspection and filling method comprising supplying a filling fluid and / or, the above-mentioned conventional problems are completely eliminated.

(Effect) For easy testing of liquid leaks immediately after new piping, or as a temporary valve for inspection of liquid storage tanks, and as a temporary valve in the event of a valve failure, simply and securely attachably and detachably as necessary. Can be used well.

(Example) Hereinafter, examples of a fluid leakage inspection / filling tool in a piping material, a sealed tank, and the like according to the present invention will be described with reference to FIGS. 1, 2 (A), (B), 3 (A), and 3 (A). (B), (C),
This will be described based on (D) and FIGS. 4 (A) and (B).

FIG. 1 is an explanatory sectional view showing one embodiment of a fluid leakage inspection / filling tool (Z) in a piping material, a sealed tank, or the like according to the present invention.

As shown in the drawing, the fluid leakage inspection / filling tool (Z) of the present invention includes a water stop piece (1) capable of passing water, an operation rod (Y),
And a hollow branch pipe described later.

The water stop piece (1) through which water can pass is provided with a water passage part (2) and a water stop part (3).

The water blocking piece (1) through which water can flow is provided with an elastic body (8). The elastic body (8) has a cylindrical shape, and is made of rubber or another material.

A through hole (8a) is formed in the elastic body (8) along the center axis thereof.

 The threaded rod (4) is inserted into the through hole (8a).

The screw rod (4) is hollow, and this hollow portion acts as a water passage (2).

The diameter of the hollow portion is desirably about one third or less of the diameter of the threaded rod (4), usually about 1 mm.

The reason is that if the diameter of the hollow portion is too small, the surface tension of the liquid acts and the liquid does not sufficiently pass through the water passage portion (2).

As shown in FIGS. 2 (A) and 2 (B), a right-hand thread (4c) is carved in the screw rod (4), and a small-diameter left-hand thread (4d) is carved in the base end. .

Further, a receiving plate (7) which is in contact with the distal end surface (8b) of the elastic body (8) is provided continuously at the distal end of the screw rod (4). The screw (4) is loosely fitted in the receiving plate (7), and the head (4e) at the tip of the screw (4) is prevented from coming off.

In the middle of the screw rod (4), the base end face (8
The washer (9) that comes into contact with c) is loosely fitted.

In the middle of the screw rod (4), a nut (4a) adjacent to the washer (9) is screwed to the base end side of the washer (9) so as to be able to advance and retreat.

The operating rod (Y) is formed of a hollow outer cylinder (5) and an inner cylinder (6) inserted through the outer cylinder (5).

At the tip of the outer cylinder (5), the nut (4a) of the water stop piece (1)
A nut turning part (5a) is formed to fit with the nut.

At the distal end of the inner cylinder (6), there is formed a female screw (6a) screwed with the proximal end of the screw rod (4) of the water stop piece (1).

The fluid leakage inspection and filling tool (Z) for the piping material, the sealed tank, etc. of the present invention having the above-described configuration is the third component.
As shown in FIGS. (A), (B), (C) and (D), the wall (1
It can be used to inspect the newly buried pipe (11) for leaks of gas or liquid in 0).

First, at the end of the pipe (11), a water stop piece (1) through which water can flow is inserted into the pipe (11) through the operation rod (Y) from a location where tapping processing for installing a cheese pipe or the like cannot be performed. .

At this time, the water stop piece (1) through which water can flow is inserted into the inner end of the pipe (11a). See FIG. 3 (A).

In this state, the nut turning part (5a) at the tip of the outer cylinder (5) is fitted with the nut (4a) provided on the halfway base end side of the screw (4) of the water stopping piece (1), Female screw (6) at the tip of 6)
a) is screwed with the left thread part (4d) of the base end (4b) of the threaded rod (4).

In this state, the inner cylinder (6) is rotated to expand the elastic body (8). See FIG. 3 (B).

Attach the water stop piece (1) to the inner end of the pipe (11a) by turning the nut (4a) of the water stop piece (1) to the nut turning part (5a) at the tip of the outer cylinder (5). And by screwing the left thread part (4d) of the water stop piece (1) to the female screw (6a) at the tip of the inner cylinder (6).

When the outer cylinder (5) is turned in the screwing direction of the nut (4a) with the water stop piece (1) inserted into the pipe (11), the nut (4a) is screwed toward the tip end of the screw rod (4). The elastic body (8) is strongly pressed between the washer (9) and the receiving plate (7),
The peripheral side surface of the elastic body (8) bulges toward the inner wall surface of the pipe (11), and the pipe (11) is closed. See FIG. 3 (C).

In this state, the hollow branch pipe (12) is screwed and connected to the base end of the screw (4). In this embodiment, the hollow branch pipe (12) includes a straight pipe section (12a) into which arbitrary pressure gas (14) flows, and a branch pipe section (12b) branched from the straight pipe section (12a). And a pressure gauge (P) is provided at the tip of the branch pipe portion (12b).

In addition, a water stop piece (1) is provided at the tip of this straight pipe part (12a).
The hollow part of the screw and the hollow part of the branch pipe are connected so as to be detachably connected to the base end of the screw (4).

In this embodiment having the above-described configuration, the pressure gas (14) flows from the hollow branch pipe (12) through the straight pipe section (12a) and enters the system through the water flow section (2). ) And inspecting the pressure drop, it is possible to inspect the pipe (11) newly buried in the wall (10) for leaks of gas or liquid. See FIG. 3 (D).

FIGS. 4A and 4B show another use state. When inspecting the liquid tank (15) for leakage or when the discharge valve (16) in the liquid tank (15) is closed due to a failure, first, as shown in FIG. (1) is closed and fixed in the opening portion (17) (which may be provided in advance or may be a newly formed opening portion) as described above.

After fixing the stop piece (1), as shown in FIG. 4 (B),
A hollow branch pipe (18) is attached to the base end of the water stop piece (1) screw rod (4), and a gas (19) such as air is supplied from the end (18a) of the branch pipe (18). Then, the pressurized gas (21) accumulates above the liquid (20) in the liquid tank (15) and presses the liquid (20).

Next, when the supply of gas (19) such as air is stopped from the end (18a) of the hollow branch pipe (18), the liquid (20) flows out from the center (18b) of the branch pipe (18).

The liquid tank (1) before attaching the discharge valve (16)
5) Inspection of liquid leak is performed by closing and fixing the water stop piece (1) that can pass water at a position where the discharge valve (16) of the liquid tank (15) is to be mounted, and the same as shown in FIG. You just have to do the processing.

(Effect of the Invention) As described in detail above, the present invention provides a water-stopper capable of passing water,
The water stopping piece comprises an operating rod and a hollow branch pipe detachably connected to the water stopping piece, and the water stopping piece capable of passing water is provided with a cylindrical elastic body, and the elastic body is provided along a central axis. A through-hole is formed, and a hollow screw rod having both ends opened is inserted into the through-hole, and a receiving plate is provided at a tip end of the screw rod to be in contact with a tip end surface of the elastic body. A washer that comes into contact with the base end surface of the elastic body is loosely fitted in the middle part of the elastic body, and a nut adjacent to the washer and the base end of the screw rod middle part is screwed so as to be able to advance and retreat. The base end is provided with a left-hand thread, and a right-hand thread is provided between the left-hand thread portion and the washer of the base end, and the operation rod is inserted through the hollow outer cylinder and the outer cylinder. And the nut of the water stop piece is provided at the tip of the outer cylinder. Nut turning portion for engagement is formed,
A female screw is formed at the distal end of the inner cylinder to be screwed with the proximal end of the threaded rod of the water stopping piece.The hollow branch pipe includes a straight pipe part and a branch pipe part, and all the ends are opened. A pipe material, a sealed tank, characterized in that one end is detachably connected to the screw rod base end of the water stop piece and the connection connects the hollow part of the screw rod and the hollow part of the branch pipe. Etc., a liquid leakage inspection / filling tool and a cylindrical stopper having a cylindrical elastic body having a through-hole formed along a central axis, wherein the through-hole is a hollow screw rod having both ends opened. Is inserted, a receiving plate is provided at the distal end of the screw rod, which comes into contact with the distal end surface of the elastic body, and a washer, which is in contact with the base end surface of the elastic body, is loosely fitted in the middle of the screw rod, and In the middle of the screw rod, adjacent to the washer at the base end from the washer And a nut which is screwed so as to be able to advance and retreat, and a left-handed screw is provided at the base end of the screw rod, and a right-handed screw is provided between the left-handed screw portion of the base end and the washer. And, consisting of a hollow outer cylinder and an inner cylinder inserted into this outer cylinder, a nut turning portion that fits with a nut of the water stopping piece is formed at the tip of the outer cylinder, and at the tip of the inner cylinder An operation rod formed with a female screw to be screwed with the proximal end of the water stop piece, a straight pipe part and a branch pipe part, all of which ends are open, and one end of the water stop piece is formed by the screw rod; A fluid leakage inspection / filling method using a hollow branch pipe that is detachably connected to the base end and is connected to the hollow part of the threaded rod and the hollow part of the branch pipe by this connection, Operate the stop piece at a place where fluid leakage inspection or fluid filling is required. With the water blocking piece fixed, the nut turning part at the tip of the outer cylinder of the operation rod is fitted with the nut of the water blocking piece, and the female screw at the tip of the inner cylinder is screwed into the screw base end. Then, in this state, the inner cylinder is rotated to expand the elastic body of the water blocking piece, the above-mentioned portion is closed by the water blocking piece, and then the operating rod is detached from the water blocking piece. Since the method is a fluid leakage inspection / filling method comprising connecting an end of a hollow branch pipe to a base end, attaching an inspection device to the other end opening of the hollow branch pipe, and / or supplying a filling fluid, It has the following excellent effects.

That is, it can be removably attached to a predetermined location as needed for a liquid leak test immediately after piping of a new pipe, or as a temporary valve in the event of a valve failure in the liquid storage tank. The closing operation can be performed extremely easily and reliably without causing the elastic body to idle, and the closing operation can be performed with extremely high workability.

Moreover, after the inside of the pipe is closed by the water blocking piece, the operation rod can be detached freely, so that the work can be temporarily stopped in a state where the inside of the pipe is closed, and at the time of the temporary stop, the operation from the tip of the pipe is performed. Since the operation stick and the like are not exposed, even if the operation is temporarily stopped, there is no hindrance to a person.

In addition, after closing the inside of the pipe in this manner, a predetermined hollow branch pipe is connected to the water stopping piece, and a pressure gauge or the like is arbitrarily attached to this branch pipe, so that a desired operation can be performed, and a wide variety of operations can be performed. It has an excellent effect that it can be used for fluid inspection and filling.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view showing an embodiment of a fluid leakage inspection / filling tool in a piping material, a sealed tank, or the like according to the present invention. FIG. 2 (A) is an external view of a water-stopper shown in FIG. FIG. 2 (B) is a vertical sectional view of the water-stopper shown in FIG. 2 (A), and FIGS. 3 (A) to 3 (D) are piping materials, sealed tanks and the like of the present invention. FIG. 4 (A) is an explanatory view showing an embodiment of a use state of the liquid leakage inspection / filling tool in FIG.
FIG. 5 (B) is a diagram illustrating the use of a fluid leakage inspection / filling tool in a piping material, a sealed tank, etc. according to another embodiment of the present invention, and FIGS. 5 (A) to (E) and FIG.
FIG. 7 is an explanatory view of a conventional example. Z: Inspection of fluid leakage in piping materials, sealed tanks, etc.
Filling tool (1) ... water stop piece, Y ... operation rod, (2) ... water passage section,
(3) ... water stop part (4) ... screw rod, (4a) ... nut, (4c) right screw part,
(4d) Left threaded part (7) ... receiving plate, (8) ... elastic body, (8a) ... through hole, (9) ... washer (5) ... outer cylinder, (5a) ... nut Turning part, (6)
Inner cylinder, (6a) ... female screw

Claims (2)

(57) [Claims] 1. A water-stopper which is permeable to water, an operating rod and a hollow branch pipe detachably connected to the water-stopper, wherein the water-stopper which is permeable to water has a cylindrical elastic body. A through-hole is formed in the elastic body along the center axis, and a hollow screw having both ends opened is inserted into the through-hole. The elastic body is inserted into the tip of the screw. A receiving plate that is in contact with the distal end surface of the elastic member is provided, and a washer that comes into contact with the base end surface of the elastic body is loosely fitted in the middle of the screw rod, and the washer is closer to the base end than the washer in the middle of the screw rod. The threaded nut is screwed so as to be able to advance and retreat, and a left-handed screw is provided at the base end of the screw rod, and a right-handed screw is provided between the left-handed threaded portion of the base end and the washer,
The operation rod includes a hollow outer cylinder and an inner cylinder inserted into the outer cylinder, and a nut turning portion that fits with a nut of the water blocking piece is formed at a tip of the outer cylinder. The distal end is formed with a female screw that is screwed with the proximal end of the threaded rod of the water stop piece.The hollow branch pipe includes a straight pipe part and a branch pipe part, all of which ends are open, and one end is formed. A fluid leakage in a piping material, a sealed tank, or the like, wherein the hollow portion of the screw and the hollow portion of the branch pipe are connected to be detachably connected to the base end of the screw of the water stop piece and are connected by this connection. Inspection and filling tools. 2. A water stopping piece comprising a cylindrical elastic body having a through-hole formed along a central axis, wherein a hollow screw rod having both ends opened is inserted into said through-hole. A receiving plate abutting on the distal end surface of the elastic body is provided at the distal end of the screw rod, and a washer that abuts on the base end surface of the elastic body is loosely fitted in the middle of the screw rod. A nut adjacent to the washer is screwed to the base end from the washer so as to be able to advance and retreat, and a left end screw is provided at the base end of the screw rod. A water blocking piece provided with a right-hand thread, a hollow outer cylinder and an inner pipe inserted into the outer pipe, and a nut turning part that fits with a nut of the water blocking piece at the tip of the outer pipe. A female thread is formed at the distal end of the inner cylinder and screwed with the proximal end of the threaded rod of the water stop piece. There the operating rod consisting formed, the end portions are all opened together comprising a straight pipe portion and the branch pipe portion,
A fluid leak is formed by using a hollow branch pipe having one end detachably connected to the base end of the water stop piece and the hollow part of the screw rod and the hollow part of the branch pipe connected by this connection. An inspection / filling method, wherein the water stop piece is inserted and fixed via a control rod at a place where inspection of fluid leakage is required or at a place where fluid is required to be filled, and the water stop piece is fixed and the operation rod is removed from the operation rod. The nut turning part at the tip of the cylinder is fitted with the nut of the water stopping piece, and the female screw at the tip of the inner cylinder is screwed with the base end of the threaded rod,
Next, in this state, the inner cylinder is rotated to expand the elastic body of the water blocking piece, and the operation rod is detached from the water blocking piece after the location is closed by the water blocking piece. A method for inspecting and filling fluid leakage, comprising connecting an end of a hollow branch pipe, attaching an inspection device to the other end opening of the hollow branch pipe, and / or supplying a filling fluid.